See also:

Engine exhaust gas (carbon monoxide)
- Never inhale engine exhaust gas. Engine exhaust gas contains carbon monoxide, a colorless and odorless gas which is dangerous, or even lethal, if inhaled. - Always properly maintain the ...

Fuel octane rating
This octane rating is the average of the Research Octane and Motor Octane numbers and is commonly referred to as the Anti Knock Index (AKI). Using a gasoline with a lower octane rating can cause p ...

Before checking or servicing in the engine compartment
WARNING ● Always stop the engine and apply the parking brake to prevent the vehicle from moving. ● Always let the engine cool down. Engine parts become very hot when the engine is ru ...